US2415578A - Spinning frame drawing roll - Google Patents

Description

Feb- 11; 1947 E. J. coU-rNEY' 2,415,578

SPINNING FRAME DRAWING ROLL Filed March 19; `194,5

' lN'vENToR.' fel/M a2? Y ATTORNEY.;

Patented Feb. l1, 1947 STAT offri 4. Claims.

This invention relates to drawing roll mechanism for spinning frames, drawing boxes, and similar textile reduction drawing machinery, and its nature, objects and advantages will be best understood from the following brief description of the conventional type of drawing box in use for many years in the production of woolen and worsted yarns and the like.

These drawing boxes have a plurality of socalled spindles, the number of which vary widely, depending upon the type of yarn, the number of ends doubled, etc., as is well understood inthe art. They are equipped with drawing roll mechanism and with what are usually termed carriage rolls, which mechanism and carriage rolls cooperate to stretch or draw the yarn (in the form of a sliver, roving, or the like) to reduce its diameter. The yarn is stretched by reason of the fact that the rolls of the drawing mechanism operate at higher peripheral speed than the carriage rolls and the yarn does not slip on the latter. The boxes may be equipped with one or more sets of drawing mechanism.

Referring now to the conventional four-spindle type, the drawing roll mechanism comprises a driven shaft carrying four longitudinally spaced drawing or driving rolls proper, which are keyed to rotate with said shaft. For each drawing roll, there is a complementary presser roll for pressing the yarn against the corresponding drawing roll in order that the yarn may be stretched or drawn. For each pair of presser rolls it has beenv the custom to provide a shaft to which the presser rolls are keyed'. Thus, in a four-spindle box'there would be one drive shaft for the drawing rolls proper, and twoshafts for the presser rolls', one for each two presser rolls. The presser roll shafts are spring pressed toward the drawing roll shaft so as to exert the necessary pressure between the presser rolls and the drawing rolls proper. The presser rolls and their shafts are rotated by the driven or drawing' rolls proper.

The standard construction thus far described is open to the following disadvantages. It is im'- possible in commercial practice to machine all of the rolls to precisely the same dimensionV of perimeter. There is always some variation. Since the presser rolls are in units of two each, on a single shaft, and therefore rotate at the same speed. the variations in perimeter as between drawing rolls, or as between presser rolls, or as between` a presser roll and its corresponding driving roll, produces deterimental results, such as friction slippage which results in. scuiiing of the yarn and is a sortof tearing action tending to remove fibers from the yarn. In addition to the non-uniformity of action on the various slivers, rovings, or the like, this is accompanied by other disadvantages which will be apparent from the following:

in case of breakage, the yarn tends to wrap around and accumulate on the presser roll shafts. Likewise, scuiTed-off fibers tend to accumulate thereon. It is. therefore, necessary at times to remove the accumulations from the shafts. Since the shafts rotate, this presents a substantial physicai hazard to the operators. The friction slippage which causes scuiiing also causes wear of the material with which the presser rolls are covered. Since there are frequently hundreds and thousands of spindles in a plant, this friction slippage results in unnecessary waste of pow er. Furthermore, in case of breakage of one sliver or roving, both presser rolls of a pair will stop.

One of the principal objects of my invention is to overcome the scuffing and to produce uniform results and to eliminate the hazards to the operator. Another object is to reduce the power requirements andminimize wear on the presser rolls.

The presser rolls are covered with facing material, such as rubber, cork or leather, which needs to be replaced from time to time, which makes it necessary to remove a pair of presser rolls and their respective shaft to be recovered.

in this connection, it is an object of my invention toA provide a multi-part instead of integral construction of presser roll, in which the rim can be detached and recovered. The advantages of this will be set forth.

How the foregoing, together with such other objects asl may hereinafter appear, or are incident to my invention, are realized, is illustrated in the accompanying drawing, wherein- The ligure is an enlarged Ycross sectional View of" my improved drawing roll mechanism, illustrating also the construction of the multi-part presser roll of my invention.

Referring nowv to the iigure, my improvements will be described. The drawing rolls proper, C, of which there would be four in al four-spindle machine, are keyed to the driving shaft E..

The. presser rolls' B; as in the conventional construction, are mounted in pairs upon a shaft D, one for each. pair. In this case, however, the shafts D do not rotate but the presser rolls are mounted so as to free wheel independently of one'A another on the shafts. To this end the hub portion' 1 of the presser rolls isi cut out so as to receive bearings, such as the ball bearings 8, the inner races of which are fitted to the shaft. The bearings are held in place and the presser rolls positioned on the shaft by means of the adjustable ring-like members cr collars 9 fastened to the shaft by set screws l0 or the like.

Thus, each presser roll of the pairs of presser rolls free wheels independently on the shaft D on which the pair `is mounted. It, therefore, makes no difference what variations in perimeter there may be as between drawing rolls or as between presser rolls. In consequence, friction slippage and scufling action, such as hereinbefore described, are eliminated and the results obtained are uniform insofar as the action of the drawing mechanism of the box on the slivers, rovings, or the like, is concerned, and the power requirements are greatly reduced, as is the wear on the coverings. Incase of breakage of one sliver, it does not affect the other which will continue to run, whereas in the old construction both rolls would stop.

Since the shafts upon which the pairs of presser rolls are mounted do not rotate, any accumulation of yarn or of bers thereon can be removed, without the physical hazard heretofore encountered in the standard construction. As in the standard construction, shafts D are spring pressed toward the shaft E to obtain the needed pressure between the drawing rolls and the presser rolls, by conventional means indicated as a whole at F. The ends of the shafts are supported in slotted standards li of conventional construction in order to provide the needed movement of the shafts toward and away from shaft E.

Coming now to the multi-part construction of the presser rolls, it will be seen that the hub portion l of the roll is provided at one end with an annular flange i2 and with a seat I3 at the other end to receive a ring member la. The rim I 5 of the presser roll is provided with a centrally located, inwardly projecting flange, shoulder or rib portion l5 which is adapted to be clamped between flange i2 and ring M by means of the studs Il or other appropriate fastening means. vThe,` assembly of the parts is simple, and

when it is necessary to recover a rim, the parts can be readily dismantled and the rims covered. Thus, by having in store a few rims as spare parts, the plant may be kept in operation with a minimum of interference, much less than heretofore incident to the standard type of construc- My improved presser roll mechanism may be substituted for the present standard presser roll construction in existing reducing and drawing mechanism of all kinds. All that is needed is to remove the pairs of old presser rolls and their shaft, and to substitute my pairs of presser rolls and their shaft. The spring pressed means which urge the presserv roll shafts toward the drawing roll shaft prevent the presser roll shafts from turning.

Another outstanding advantage of my improvement is that whereas, in the old construction, it Was necessary to oil the drawing roll mechanism at a multiplicity of points, in my arrangement it is unnecessary to do any oiling at all. This, among other things, has the advantage that the spotting of the yarn with grease or oil is eliminated, which is quite an advantage.

The adjustability of the mounting of the presser rolls with respect to the shaft is also an important advantage, as willlbe clear from the following.

4 In the conventional construction, when it was necessary to recover a presser roll, a pair of presser rolls and their shafts had to be removed for recovering; and another pair of rolls and their shaft substituted therefor. The substitute pair of rolls might or might not aline with the particular complementary drawing or bottom rolls and might, therefore, be unsuitable. Only a pair which will aline can be used. By my improved construction of presser roll the hubs of the rolls are initially adjusted and remain in that adjustment on the shaft. When the rim is removed for recovery and a new rim substituted, the shaft goes back in the same place from which it came and, therefore, its rolls are in the alinement to which they had been previously adjusted. This facilitates plant operation veryr materially, as will be appreciated by those skilled in the art.

Moreover, my invention results in a further saving in power requirements for the reason that the only parts which turn are the rolls themselves and these `run on ball bearings. In the old construction the pressure shafts had to be turned and there were a plurality of bushing bearings for each shaft, the friction of which had to be overcome.

What I claim is:

l. In a spinning drawing box and the like, presser roll mechanism comprising a non-rotatable shaft and at least one presser wheel; the presser Wheel having separable hub and rim members, the hub being rotatably carried on the shaft; and having at one end an annular flange normal to the axis of the shaft and having at the other end a seat for a ring; said ring; the rim having a central inwardly projecting annular shoulder, the rim being adapted to be supported by the flange and the ring, and the shoulder being adapted to be clamped between the flange and the ring; means for detachably securing the flange and the ring in a manner to so clamp the shoulder; the flange, the shoulder, and the ring cooperating to maintain the rim in xed relationship with the hub; and means for positioning the hub on the shaft, the ring'being removable over the positioning means; whereby the ring and the rim may be removed without disturbing the position of the hub on the shaft.

`2.- Ina spinning drawing boX and the like, presser roll mechanism comprising a non-rotatable shaft having at least one presser wheel; the presser wheel having separable hub and rim members, said rim having an inwardly projecting annular shoulder; said hub having bearing means rendering it freely rotatable on the shaft; and having an annular flange at one end normal to the axis of the shaft and having at the other end a seat for a ring; said ring; the rim being adapted to be supported by the flange and the ring, .and the shoulder being adapted to be clamped'between the flange and the ring; means for detachably securing the flange and the ring in a manner to so clamp the shoulder; the flange, the shoulder, and the ring cooperating to maintain the rim in xed relationship with the hub;` means for positioning the bearing means and the hub onv the shaft, the hub being free to rotate without contact with the positioning means; and the ring being removable over the positioning means; whereby the ring and the rim may be removed without disturbing the position of the hub on the shaft.

non-rotatable shaft for each pair of presser wheels; two presser wheels, each presser wheel having separable hub and rim members, the hub being rotatable on the shaft and having an annular flange at the inside end normal to the. axis of the shaft and having at the other, or outside, end, a seat for a ring; said ring; the rim having a central inwardly projecting annular shoulder, said rim being adapted to be supported bythe ange and the ring, and the shoulder being adapted to be clamped between the flange and the ring in a manner to so clamp the shoulder; the flange, the shoulder, and the rim cooperating to maintain the rim in fixed relationship with the hub; means for positioning the hub on the shaft, the ring being removable over the positioning means, whereby the ring and the rim may be removed outwardly without disturbing the position of the hub on the shaft.

4. In a spinning drawing box and the like, presser wheel mechanism comprising a non-rotatable shaft for each pair of presser wheels, two presser wheels rotatable on the shaft, each wheel comprising separable hub and rim members, means for positioning the hub on the shaft, the rim and hub having complementary interengaging portions serving to position the rim axially and radially with respect to the hub but configured to provide for axial displacement of the rim with respect to the hub, the said interengaging 6 portions of the rim vand hub of one wheel being arranged axially in inverted relation to the interengaging portions of the rim and hub of the other wheel to provide for axial displacement of the two wheel rims in opposite axial directions away from each other, and means for detachably securing the rims to the hubs in ixed axial relationship, such securing means for the two wheels being accessible from the outer *sides of the wheels; whereby the rim of either wheel may be removed from its hub axially to the outside without disturbing the alignment of its respective hub or the alignment of the other wheel.

EDWARD J. COURTNEY.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 2,072,451 Hughes Mar. 2, 1937 2,111,926 Eves Mar. 22, 1938 1,904,498 McGhee Apr. 18, 1933 FOREIGN PATENTS Number Country Date 15,335 British 1904 237,482 British July 30, 1925 592,743 French Aug. 8, 1925

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